JSON Beautifier Keeps the Digits Intact

Field notes

The page combines a live formatter with a repair workflow: it identifies a problem by line and column, explains it in plain English, and shows the exact change before applying it. It also exposes measurements such as node count, nesting depth, size change, and integers beyond 2⁵³. The site says its handling of large identifiers avoids the silent rounding common to JavaScript-based tools, and lists support for malformed inputs including comments, Python literals, missing brackets, and fenced AI responses.